AT&T Wi-Fi Supports Auto-Authentication on iPhone OS 3.0

AT&T will support auto-authentication for iPhone OS 3.0 user, enabling iPhone users to seamlessly switch from AT&T's 3G network to an AT&T Wi-Fi Hot Spot without being prompted. Previously, there was a two-step process. AT&T customers with qualifying iPhone data plans have unlimited access to the more than 20,000 U.S. AT&T Wi-Fi Hot Spots.

AT&T noted that more than 4 million connections were made at its U.S. Hot Spots with smartphones, including the iPhone 3G, during Q1 2009.
http://www.attwifi.com